Castaway Island Hostel

Fourteen beds above Mushroom Bay's clearest snorkeling shelf, Castaway Island Hostel earns a 9.6 rating from 131 reviews — one of Nusa Lembongan's highest-rated properties regardless of category. The adults-only ground-floor layout keeps noise predictable and communal areas open until late.

Beach chairs and umbrellas front the bay directly, with canoeing, diving, and snorkeling bookable through the tour desk without leaving the property. Happy hour runs at the bar each evening; movie nights and a game room absorb the quieter stretches between tides.

Mushroom Bay sits on Lembongan's calmer southwest coast, a short bicycle rental ride from Devil's Tear and the mangrove channel. Fast boats from Sanur deposit passengers at the nearby public pier in around thirty minutes.